Electronic device for providing call continuity in weak electric field environment and control method

Abstract

Provided are an electronic device and a control method for providing call continuity in a weak electric field environment. The electronic device according to various embodiments of the present document comprises: a processor; a memory operatively connected to the processor; and a wireless communication circuit operatively connected to the processor and the memory, wherein the processor can control the wireless communication circuit such that the electronic device receives a wireless signal for executing a call with an external electronic device through a first network, check the state of the wireless signal received through the wireless communication circuit, control, on at least a partial basis of a result of checking the checked state of the wireless signal, the wireless communication circuit such that an authentication request for performing the call is transmitted to a second network connected to the electronic device, and control, on at least a partial basis of a result of the authentication request, the wireless communication circuit such that the wireless signal, which is transmitted from the first network, for performing the call with the external electronic device is received through the second network.

What is claimed is: 
     
       1. An electronic device comprising:
 a processor; 
 a transceiver operatively connected with the processor; 
 a first subscriber identification module (SIM) and a second SIM operatively connected with the processor; and 
 a memory storing instructions, which, when executed by the processor, cause the electronic device to:
 execute a call with a counterpart device using a first network corresponding to the first SIM, 
 while executing the call with the counterpart device using the first network, identify a state of a radio signal transmitted from a base station of the first network, 
 based on the state of the radio signal, transmit, through the transceiver, a request for establishing a security tunnel between a first server of the first network and a second server of a second network, to the second server of the second network corresponding to the second SIM, 
 in response to transmitting the request, receive, through the transceiver, a response transmitted from the second server of the second network, 
 transmit connection information, provided from a third server of the first network to execute the call with the counterpart device, to the second server of the second network corresponding to the second SIM, and 
 execute the call with the counterpart device using the second network corresponding to the second SIM. 
 
 
     
     
       2. The electronic device of  claim 1 , wherein the request comprises a request for an authentication related to the electronic device. 
     
     
       3. The electronic device of  claim 2 , wherein the request comprises information identifying the first server. 
     
     
       4. The electronic device of  claim 1 , wherein the first server comprises an enhanced packet data gateway (ePDG). 
     
     
       5. The electronic device of  claim 1 , wherein the second server comprises an internet public data network (PDN) or P-GW (PDN gateway). 
     
     
       6. The electronic device of  claim 1 , wherein the first network comprises at least one of Voice over Long Term Evolution (VoLTE), Video over LTE (ViLTE), Voice over WiFi (VoWiFi), or Video over WiFi (ViWiFi). 
     
     
       7. The electronic device of  claim 1 , wherein the security tunnel is established based on IKEv2 or based on L2TP/IPSec. 
     
     
       8. The electronic device of  claim 1 , wherein the response comprises an authentication key generated by the first server. 
     
     
       9. The electronic device of  claim 1 , wherein the third server comprises an IMS server. 
     
     
       10. The electronic device of  claim 9 , wherein the connection information comprises information for identifying the IMS server. 
     
     
       11. A method for controlling an electronic device, the method comprising:
 executing a call with a counterpart device using a first network corresponding to a first subscriber identification module (SIM), 
 while executing the call with the counterpart device using the first network, identifying a state of a radio signal transmitted from a base station of the first network, 
 based on the state of the radio signal, transmitting a request for establishing a security tunnel between a first server of the first network and a second server of a second network, to the second server of the second network corresponding to a second SIM, 
 in response to transmitting the request, receiving a response transmitted from the second server of the second network, 
 transmitting connection information, provided from a third server of the first network to execute the call with the counterpart device, to the second server of the second network corresponding to the second SIM, and 
 executing the call with the counterpart device using the second network corresponding to the second SIM. 
 
     
     
       12. The method of  claim 11 , wherein the request comprises a request for an authentication related to the electronic device. 
     
     
       13. The method of  claim 12 , wherein the request comprises information for identifying the first server. 
     
     
       14. The method of  claim 11 , wherein the first server comprises an enhanced packet data gateway (ePDG). 
     
     
       15. The method of  claim 11 , wherein the second server comprises an internet public data network (PDN) or P-GW (PDN gateway). 
     
     
       16. The method of  claim 11 , wherein the security tunnel is established based on IKEv2 or based on L2TP/IPSec. 
     
     
       17. The method of  claim 11 , wherein the response comprises an authentication key generated by the first server. 
     
     
       18. The method of  claim 11 , wherein the third server comprises an IMS server. 
     
     
       19. The method of  claim 18 , wherein the connection information comprises information for identifying the IMS server. 
     
     
       20. A non-transitory computer-readable medium storing instructions which, when executed by one or more processors of an electronic device comprising at least processor, cause the electronic device to perform operations comprising:
 executing a call with a counterpart device using a first network corresponding to a first subscriber identification module (SIM), 
 while executing the call with the counterpart device using the first network, identifying a state of a radio signal transmitted from a base station of the first network, 
 based on the state of the radio signal, transmitting a request for establishing a security tunnel between a first server of the first network and a second server of a second network, to the second server of the second network corresponding to a second SIM, 
 in response to transmitting the request, receiving a response transmitted from the second server of the second network, 
 transmitting connection information, provided from a third server of the first network to execute the call with the counterpart device, to the second server of the second network corresponding to the second SIM, and 
 executing the call with the counterpart device using the second network corresponding to the second SIM.